Make the declarative collection surface carry a `kind` so docs (and future
kinds) are declarable. Back-compatible: the shipped `collections = ["catalog"]`
form still means kv.
- manifest: `collections` entries are now `CollectionDecl` — an untagged enum of
a bare string (kv shorthand) or a `{ name, kind }` table (kind ∈ kv/docs).
`Manifest::collections()` normalizes to `(name, kind)` pairs; build_bundle
emits `[{name, kind}]`. Still `[group]`-only. Unit test covers the
string-or-table mix + app rejection.
- apply: `Bundle.collections: Vec<CollectionSpec>` ({name, kind=default "kv"});
`CurrentState.collections: Vec<(name,kind)>` via list_all_for_owner;
`diff_collections` keys each change by name with `detail = kind` and identity
`(LOWER(name), kind)` (so a kv and a docs collection of the same name are
distinct); reconcile reads the kind from `detail`; state_token folds
`coll|{kind}|{name}`; validate_bundle rejects unknown kinds + dups by
(name,kind); `collection_report`/CollectionInfo + `pic collections ls` gain a
kind column.
Existing kv journeys + nearest-wins still green (the bare-string form normalizes
to kind=kv end to end).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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